1. pick the brand: as far as possible to the large-scale regular store to buy a better reputation of the brand of goods, genuine have a clear bar code, the manufacturer address and production date, and the appearance of neat, printed neat, thick and delicate color, Feel thick, have a certain toughness and strength. Such as Henan Kangdi Pharmaceutical Co., Ltd. production of warm patch.

2. Look at the packaging: to pay attention to look at the appearance of warm patch and bags, good warm patch’s surface clean and smooth without particles, neatly on both sides, and paste a solid bag. At the same time, heat evenly lasting, after the bag should be hard and hard, and into a hard board, poor quality of the bag material loose.

3 shop around: The high quality warm patch’s raw materials using oxygen non-woven fabrics and high-quality iron powder. The price of these raw materials is relatively high, resulting in the price of finished products is relatively high. Some genuine warm patch price is inferior to the product several times. Therefore, the purchase can not blindly seek cheap.